error="is dirty" when git working tree is clean

Installed via brew:

```
~/Dev/cloud-extension-yii2 1.x
❯ bump patch
ERRO[0005] test dirty                                    error="is dirty"
Error: is dirty
ERRO[0005] ExecuteContext                                error="is dirty"

~/Dev/cloud-extension-yii2 1.x 5s
❯ git st
On branch 1.x
Your branch is up to date with 'origin/1.x'.

nothing to commit, working tree clean
```